From 8f5701860d48977fadbfaa1ca652d76b6cb89759 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Simon=20Sp=C3=B6hel?= <simon@spoehel.ch>
Date: Wed, 14 Apr 2021 17:30:50 +0200
Subject: Adding basic functionality to start a VM.

---
 libexec/container/start-qemu | 115 ++++++-------------------------------------
 share/systemd/kvm@.service   |  13 +++++
 2 files changed, 29 insertions(+), 99 deletions(-)
 create mode 100644 share/systemd/kvm@.service

diff --git a/libexec/container/start-qemu b/libexec/container/start-qemu
index b7953c1..491278c 100755
--- a/libexec/container/start-qemu
+++ b/libexec/container/start-qemu
@@ -125,9 +125,9 @@ case "${NAME}" in
 		;;
 esac
 
-if [ ! -e "${MACHINES}/${NAME}" ]
+if [ ! -e "${MACHINES}/${NAME}.img" ]
 then
-	echo "'${NAME}': no such container" >&2
+	echo "'${NAME}': no such vm" >&2
 	exit 1
 fi
 
@@ -166,7 +166,9 @@ then
 fi
 
 HOST_ARCHITECTURE="$(dpkg --print-architecture)"
-MACHINE_ARCHITECTURE="$(chroot ${MACHINES}/${NAME} dpkg --print-architecture)"
+#FIXME
+#MACHINE_ARCHITECTURE="$(chroot ${MACHINES}/${NAME} dpkg --print-architecture)"
+MACHINE_ARCHITECTURE=amd64
 
 case "${HOST_ARCHITECTURE}" in
 	amd64)
@@ -201,91 +203,6 @@ esac
 # config
 if [ -e "${CONFIG}/${NAME}.conf" ]
 then
-	CNT_OVERLAY="$(awk -Fcnt.overlay= '/^cnt.overlay=/ { print $2 }' ${CONFIG}/${NAME}.conf)"
-	CNT_OVERLAY_OPTIONS="$(awk -Fcnt.overlay-options= '/^cnt.overlay-options=/ { print $2 }' ${CONFIG}/${NAME}.conf)"
-
-	if [ -n "${CNT_OVERLAY}" ]
-	then
-		CNT_OVERLAYS="$(echo ${CNT_OVERLAY} | sed -e 's|;| |g')"
-
-		COUNT="0"
-		for CNT_OVERLAY in ${CNT_OVERLAYS}
-		do
-			DIRECTORY_LOWER="$(echo ${CNT_OVERLAY} | awk -F: '{ print $1 }')"
-			DIRECTORY_UPPER="$(echo ${CNT_OVERLAY} | awk -F: '{ print $2 }')"
-			DIRECTORY_WORK="$(echo ${CNT_OVERLAY} | awk -F: '{ print $3 }')"
-			DIRECTORY_MERGED="$(echo ${CNT_OVERLAY} | awk -F: '{ print $4 }')"
-
-			COUNT="$((${COUNT} + 1))"
-			CNT_OVERLAY_OPTION="$(echo ${CNT_OVERLAY_OPTIONS} | awk -F ';' "{ print \$${COUNT} }")"
-
-			for DIRECTORY in "${DIRECTORY_LOWER}" "${DIRECTORY_UPPER}" "${DIRECTORY_WORK}" "${DIRECTORY_MERGED}"
-			do
-				mkdir -p "${DIRECTORY}"
-			done
-
-			if ! findmnt -n -o SOURCE "${DIRECTORY_MERGED}" | grep -qs '^cnt.overlay-'
-			then
-				if [ -n "${CNT_OVERLAY_OPTION}" ]
-				then
-					CNT_OVERLAY_OPTION="-o ${CNT_OVERLAY_OPTION}"
-				fi
-
-				mount cnt.overlay-${NAME} -t overlay ${CNT_OVERLAY_OPTION} -olowerdir="${DIRECTORY_LOWER}",upperdir="${DIRECTORY_UPPER}",workdir="${DIRECTORY_WORK}",default_permissions "${DIRECTORY_MERGED}"
-			fi
-		done
-	fi
-
-	BIND="$(awk -Fbind= '/^bind=/ { print $2 }' ${CONFIG}/${NAME}.conf)"
-
-	if [ -n "${BIND}" ]
-	then
-		BINDS="$(echo ${BIND} | sed -e 's|;| |g')"
-
-		for BIND in ${BINDS}
-		do
-			DIRECTORY="$(echo ${BIND} | awk -F: '{ print $1 }')"
-
-			if [ ! -e "${DIRECTORY}" ]
-			then
-				echo "'${DIRECTORY}': creating non-existing directory for bind mounting"
-				mkdir -p "${DIRECTORY}"
-			fi
-		done
-
-		BIND=""
-
-		for DIRECTORIES in ${BINDS}
-		do
-			BIND="${BIND} --bind ${DIRECTORIES}"
-		done
-	fi
-
-	BIND_RO="$(awk -Fbind-ro= '/^bind-ro=/ { print $2 }' ${CONFIG}/${NAME}.conf)"
-
-	if [ -n "${BIND_RO}" ]
-	then
-		BINDS_RO="$(echo ${BIND_RO} | sed -e 's|;| |g')"
-
-		for BIND_RO in ${BINDS_RO}
-		do
-			DIRECTORY="$(echo ${BIND_RO} | awk -F: '{ print $1 }')"
-
-			if [ ! -e "${DIRECTORY}" ]
-			then
-				echo "'${DIRECTORY}': creating non-existing directory for bind-ro mounting"
-				mkdir -p "${DIRECTORY}"
-			fi
-		done
-
-		BIND_RO=""
-
-		for DIRECTORIES in ${BINDS_RO}
-		do
-			BIND_RO="${BIND_RO} --bind-ro ${DIRECTORIES}"
-		done
-	fi
-
 	BOOT="$(awk -Fboot= '/^boot=/ { print $2 }' ${CONFIG}/${NAME}.conf || echo yes)"
 
 	case "${BOOT}" in
@@ -311,7 +228,7 @@ then
 	esac
 
 	DIRECTORY="$(awk -Fdirectory= '/^directory=/ { print $2 }' ${CONFIG}/${NAME}.conf || echo ${MACHINES}/${NAMES})"
-	DIRECTORY="--directory ${DIRECTORY}"
+	DIRECTORY="-drive file=${DIRECTORY}.img,format=raw,if=virtio"
 
 	DROP_CAPABILITY="$(awk -Fdrop-capability= '/^drop-capability=/ { print $2 }' ${CONFIG}/${NAME}.conf)"
 
@@ -350,9 +267,10 @@ then
 		*)
 			for VETH in ${VETHS}
 			do
-				NETWORK_VETH_EXTRA="${NETWORK_VETH_EXTRA} --network-veth-extra=${VETH}"
 				INTERFACE="$(echo ${VETH} | awk -F: '{ print $1 }')"
 
+				NETWORK_VETH_EXTRA="${NETWORK_VETH_EXTRA} -netdev tap,id=${INTERFACE},ifname=${INTERFACE},script=no,downscript=no -device virtio-net-pci,netdev=${INTERFACE}"
+
 				if [ "$(echo ${INTERFACE} | wc -c)" -gt 15 ]
 				then
 					echo "'${INTERFACE}': name exceeds maximum of 15 characters, network might be not working."
@@ -452,7 +370,7 @@ fi
 
 case "${SYSTEMCTL}" in
 	true)
-		systemctl start ${PROGRAM}@${NAME}.service
+		systemctl start kvm@${NAME}.service
 
 		# Post hooks
 		for FILE in "${HOOKS}/post-${COMMAND}".* "${HOOKS}/${NAME}.post-${COMMAND}"
@@ -469,12 +387,6 @@ esac
 
 case "${START}" in
 	true)
-
-		case "${SET_PROPERTY}" in
-			true)
-				systemctl --runtime set-property ${NAME} ${BLOCK_IO_DEVICE_WEIGHT} ${BLOCK_IO_READ_BANDWIDTH} ${BLOCK_IO_WEIGHT} ${BLOCK_IO_WRITE_BANDWIDTH} ${CPU_QUOTA} ${CPU_SHARES} ${MEMORY_LIMIT} ${TASKS_MAX}
-				;;
-		esac
 		;;
 
 	*)
@@ -486,8 +398,13 @@ case "${START}" in
 				;;
 		esac
 
-		${SETARCH} systemd-nspawn --keep-unit ${BIND} ${BIND_RO} ${BOOT} ${CAPABILITY} ${DIRECTORY} ${DROP_CAPABILITY} ${MACHINE} ${NETWORK_VETH_EXTRA} ${LINK_JOURNAL} ${REGISTER}
-
+		qemu-system-x86_64 \
+			-machine  accel=kvm:tcg \
+			${DIRECTORY} \
+			-m 4G \
+			-name ${NAME} \
+			${NETWORK_VETH_EXTRA} \
+			-bios /usr/share/qemu/OVMF.fd
 
 		case "${VERBOSE}" in
 			true)
diff --git a/share/systemd/kvm@.service b/share/systemd/kvm@.service
new file mode 100644
index 0000000..41fea21
--- /dev/null
+++ b/share/systemd/kvm@.service
@@ -0,0 +1,13 @@
+[Unit]
+Description="Container: %i"
+Documentation=man:compute-tools
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/container start-qemu -n %i --nspawn
+ExecStartPost=/usr/bin/container start-qemu -n %i --start
+#ExecStopPost=/usr/bin/container stop -n %i --clean --no-notification
+KillMode=mixed
+
+[Install]
+WantedBy=multi-user.target
-- 
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